South Bend firefighters responding to an early morning house fire discovered a man dead inside.

WNDU-TV and WSBT-TV report firefighters have been unable to search the entire house on the city's south side because the roof caved in. Flames were going through the roof when firefighters arrived about 6:15 a.m.

The name of the man found inside the home has not been released. The cause of the fire is under investigation.